#!/bin/sh

result=$(egrep gaowei </etc/passwd )
echo "$result"

#exit 1


if [[ $? == 0 ]] ; then
	echo "I know $?"
fi

if [[ -z "$1" ]] ; then
	echo "1"
	echo "$1"
fi

if [[ -z 0 ]];then
	echo "0"
fi

if [[ -z 1 ]];then
	echo "0"
fi
